Water-heater



V.JH. STOTT AND L. SCHOFIEED.

WATER HEATER. APPLICATIONAHLED AUG- s, 1920.

. 1, ,-35 ,415 Patented 00th 19, 1920.

UNITED STATES PATENT OFFICE.

VERNON HEY WOOD STOTT AND LEE SCHOFIELD, OF OLZDHAM, ENGLAND.

WATER-HEKTER.

Specification of Letters iatcnt.

I Patented Oct. 19, 1920.

application filed August 6, 1920. Serial No. 401,815.

T 0 all whom it may concern:

Be it known that we, VERNON HEYwooD SToTT and LEE SCHOFIE'IJD, subjectsof the King of Great Britain, residing at Oldham, Lancashire, England,have invented certain new and useful Improvements in Waterl-I'eaters, ofwhich the following is a speciflcatfion.

This invention relates to water heaters 'of the kind set for-thin thespecification of our British Patent No. 20977 of 1914 and in which afloat 'o'r inverted cup is used for regulating the gas supply, the floatis formed with or has attached thereto a lip which projects from thefloat and contacts with a tappe't lever operating a valve which closesor opens a gas supply to the heating burners as the float rises or fallsdue to the generation of steam or vapor under In the crown of the floata relief hole or valve is provided to allow the steam or vapor toescape.-

The object of this invention is to utilize the vapor or steam escapingthrough the relief hole in the crown of the float for heating purposeswith the known automatic control of the gas supply or heating medium atthe same time.

For the purpose of our invention we lengthen or extend the wall of thefloat chamber sufficiently high and of a diameter to act as a well forthe reception of glue pots, pans, food warming ovens, hot plates,steamers, etc., whose contents requ re to be heated.

Our invention will be clearly understood from the following descriptionaided by the example shown on the annexed drawings in which- Figure 1 isa sectional elevation of our invention applied to a glue pot, and Figs.2, 3 and 4 similar views of our invention applied to a steamer, a foodwarming oven and a hot plate respectively.

Fig. 5 is a sectional view of suflicient of a heater to illustrate amodification.

We form the float chamber ,A containing the float or inverted cup B withenlarged and lengthened walls which act as a well C- in which isositioned a glue pot D (Fig. 1), ovens E (Fig. 3) or on which can bepositioned a steamer F (Fig. 2) or hot plate Gr (Fig. 4).

The well is of sufiicient diameter to inclose the regulating finger Hfrom the float the well G and has engagement with the spindle L of thegas regulating valve M the rising or falling of the float A decreasingor increasing the supply of gas to the burner N as will be wellunderstood.

,Inthte crown of the float A is the usual relief hole ,0 which admitsthe steam from under the float A into the well C which becomes filledwith steam escaping through the relief opening 0 of the float A.

In this way the necessary heat is transmitted to the contents of thepans while regulation "of the gas supply takes place simultanecusly.

The steam under the float being closely confined and under slightpressure is necessaiily hotter than that escaping from the water in theannulus around the float and the more steam allowed to escape throughthe relief opening the greater and the quicker the heat performance inthe well C.

The volume of steam therefore available for the object in view'will bedetermined by the size of the relief opening 0 and the size of the floatA, the larger the float and relief opening the greater the amount ofsteam escaping and available for heating in the well C and vice versa.

The float chamber A is of just suflicient size to allow of the freeworking of the float B and any steam escaping from the annulus aroundthe float B does not serve any useful purpose in regulating the floatand is practically negligible for heating in the well C.

In addition to its application and use for the purposes mentioned, itmay be employed as will be readily understood for heating hot closets,and for ordinary heating purposes within certain limits, and a tap maybe fitted as shown in dotted lines Fig. 2 for drawing hot water.

In some cases it may be desirable to increase the heat in the well Cbeyond that of the steam escaping through the relief opening 0 and forthis purpose the water line could be deep enough to cover a portion ofthe well extension in which case the tubular bearing K would be made toextend far-- ther into the well above the water line as at Fig. 5 so asto prevent the water escaping through the bearing out of the well.

In cases where the liquid or material only requires to be heated to acomparatively low temperature, only a very small relief hole is neededand sometimes this hole would be so small and fine that it would becomeblocked up by grit, and in hard water districts it might be thateventually scale deposition would block it up.

As an alternative we employ a larger relief hole 0 as in Fig. 5and'insert a loose valve piece P which while partially closing up therelief hole 0, just allows sufficient space between the periphery of theneck of the valve piece P and the edge of the relief hole 0 for therequisite amount of steam to escape.

What we do claim as our invention and desire to secure by Letters Patentis 1. In combination, a receptacle having a lower chamber adapted tocontain a liquid, and an upper chamber in which is positioned an objectto be heated, a float in said lower chamber open at the lower end andformed with an aperture at the upper end, a source of heat associatedwith said lower chamber for heating the liquid therein whereby vaporunder pressure may collect under said float and escape through saidaperture for heating the bject'in the upper chamber and means influencedby the vertical portion of said float for controlling the source ofheat.

2. In combination, areceptacle having a lower chamber adapted to containa liquid and. an upper chamber for receiving an object to be heated, afloat in said liquid of trolling the source of heat.

In a heating receptacle having a chambeer for receiving a liquid, and acompartment communicating therewith for receiving an object to beheated, a source of heat for the liquid and a float within said chamberfor partiallyconfining the vapor from said liquid, said float having arelief opening formed therein for permitting the escape of vapor underpressure for heating the object in said compartment and means controlledby the position of said float for regulating said source of heat.

In testimony whereof we. have hereunto set our hands in presence of twosubscribing witnesses.

VERNON HEYWOOD srorr. LEE SCHOFIELD, r

Witnesses as to Vernon Heywood Stott:

ERNALD S. MOSELEY,

' JOHN W. THOMAS.

Vv'itnesses as to Lee Schofield:

WILLIAM PEARCE, HAROLD Gokn GARDNER.

